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Source process of a long-period event at Kilauea volcano, Hawaii 总被引:1,自引:0,他引:1
Hiroyuki Kumagai Bernard A. Chouet Phillip B. Dawson 《Geophysical Journal International》2005,161(1):243-254
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Design of a Marine Seismic Reflection Profiling System using Air Guns as a Sound Source 总被引:1,自引:0,他引:1
《Geophysical Journal International》1971,23(5):499-530
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Source discriminants for near-field tsunamis 总被引:3,自引:0,他引:3
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F. Courboulex J. Virieux A. Deschamps D. Gibert A. Zollo 《Geophysical Journal International》1996,125(3):768-780
We propose a two-step inversion of three-component seismograms that (1) recovers the far-field source time function at each station and (2) estimates the distribution of co-seismic slip on the fault plane for small earthquakes (magnitude 3 to 4). The empirical Green's function (EGF) method consists of finding a small earthquake located near the one we wish to study and then performing a deconvolution to remove the path, site, and instrumental effects from the main-event signal.
The deconvolution between the two earthquakes is an unstable procedure: we have therefore developed a simulated annealing technique to recover a stable and positive source time function (STF) in the time domain at each station with an estimation of uncertainties. Given a good azimuthal coverage, we can obtain information on the directivity effect as well as on the rupture process. We propose an inversion method by simulated annealing using the STF to recover the distribution of slip on the fault plane with a constant rupture-velocity model. This method permits estimation of physical quantities on the fault plane, as well as possible identification of the real fault plane.
We apply this two-step procedure for an event of magnitude 3 recorded in the Gulf of Corinth in August 1991. A nearby event of magnitude 2 provides us with empirical Green's functions for each station. We estimate an active fault area of 0.02 to 0.15 km2 and deduce a stress-drop value of 1 to 30 bar and an average slip of 0.1 to 1.6 cm. The selected fault of the main event is in good agreement with the existence of a detachment surface inferred from the tectonics of this half-graben. 相似文献
The deconvolution between the two earthquakes is an unstable procedure: we have therefore developed a simulated annealing technique to recover a stable and positive source time function (STF) in the time domain at each station with an estimation of uncertainties. Given a good azimuthal coverage, we can obtain information on the directivity effect as well as on the rupture process. We propose an inversion method by simulated annealing using the STF to recover the distribution of slip on the fault plane with a constant rupture-velocity model. This method permits estimation of physical quantities on the fault plane, as well as possible identification of the real fault plane.
We apply this two-step procedure for an event of magnitude 3 recorded in the Gulf of Corinth in August 1991. A nearby event of magnitude 2 provides us with empirical Green's functions for each station. We estimate an active fault area of 0.02 to 0.15 km
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Source scaling of intermediate-depth Vrancea earthquakes 总被引:3,自引:0,他引:3
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Wang Qifeng Jiang Fujie Ji Hancheng Jiang Shu Guo Fangxin Gong Shuangyi Wang Ze Liu Xiaohan Li Boshi Chen Yuanyuan Deng Qian 《Natural Resources Research》2020,29(6):4053-4072
Natural Resources Research - Organic matter enrichment in shale is one of the key factors that control shale oil resources; however, studies of the mechanism of organic matter enrichment in shale... 相似文献